Turbine reversing mechanism



g 3 A. H. KATTERJOHN TURBINE REVERSING MECHANISM 15' 77 10- 25252/ a1 15 la? 5.

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Patented Aug. 23, 1927.

AUGUST H. KATfrianaoim,y or DENVER., coLonADo, salomon To 'rma DENVER Booz n DRILL no. coMrANY. p c. v

REVERSING MECHANI'SI.

Application filedv October 3, 1922. Serial No. 592,049.

The present invention relates to valves by which the direction of rotation of a turbine can be effected, and while particularly intendedV for use in connection with the chuck rotation mechanism of a rock drill is not necessarily limited thereto.

The object is to provide a simple controlling valve which will be effective for the purpose and occupy but little space, so that it will not interfere with the other mechanism.

The preferred embodiment of the invention is illustrated in the accompanying drawings, wherein Figure 1 is a view in elevation of a wellknown type of rotary motor showing the controlling valve mechanism thereon and in section,

Figure 2 is a sectional view on the line 2 2 of Figure 1,

Figure 3 is a view similar to Figure 2, vbut showing the valve shifted.

In the embodiment disclosedl the motor consists of a. cylinder member 4 containinor intermeshing gear pistons indicated at 5. valve casing 6 is mounted on the cylinder member and contains an elongated valve chamber 7. This valve casing has an offset conduit 8 extending across the cylinder member 4 and provided with a combined intake and exhaust port 9 communicating with the piston chamber at one side of the intermeshing portions of the gear pistons 5. The other end of the conduit communicates as shown at 10 with one end of the valve chamber 7 said valve chamber also having another port 11 in the same end portion, and this port opens into the piston chamber on the opposite side of the intermeshing portions of the piston to the port 9. A supply port 12, connected with any suitable source of fluid under pressure, opens into the other end of the valve chamber 7, and two exhaust ports 13 and 14 are cut transversely through the valve casing into the valve chamber 7 adjacent to the ports 10 and 1l.

Slidably mounted in the valve chamber 7 is a plunger valve, the body of which is designated 15, this valve having an actuating linger stem 16 which is held in projected relation by a coiled spring 17 bearing against the inner end of the valve body, and seated in a closure plug 18 threaded into one end of the valve chamber 7. The valve body is provided with a longitudinal passageway 19 provided at one end with ports 20 affording constant communication with the supply port 12. Other ports 2l, communicating with the'other end of the passageway 19 open into an annular groove 22 formed in the inner end portion of the valve body, providing a head 23 and a flange 24. A centrally disposed annular external groove 25 is also provided in the valve body 15.

With the structure as shown in Figure l, it will be evident that motive fluid entering the valve chamber 7 through the port 12 can flow freely through the ports 20, passageway 19, ports 21, groove 22 and port 11 into the cylinder member 4, and thus drive the pistons in one direction, the exhaust taking place through the ports 9 and 10, the rear end of the valve chamber 7 and port 13. to atmosphere. If the valve is moved inwardly against the tension of the spring 17 the groove 22 will be brought into communication with the passageway 10 and port 9, so that the iuid will then enter the cylinder member on the opposite sides of the pistons, reversing the direction of .rotation thereof whilethe roove 25 being now in communication wit the port 11 and port 14, will permit the opposite exhaust to take place.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion and minor details of construction may be resorted to without departing from the spirit or sacricing any of the advantages of the invention.

Having thus fully described my invention what I claim as new, and desire to secure by Letters Patent, is

A reversible rotary motor, comprising a cylinder member having a piston chamber and a valve casing on one side thereof, having an elongated valve chamber, rotary intermeshed pistons in the piston chamber, said cylinder member having a pair of combined intake and exhaust ports that communicate with the piston chamber on opposite sides of the intermeshed portions of the pistons, said chamber also having a supply port opening thereinto and having exhaust permitting means, a reciprocatory plunger valve in the chamber having an internal passage with an inlet port that is in constant communication with the portion of the chamber into which said supply port opens, said passage also having an outlet port that is movable With the valve into communication with either of a pair of combined intake and exhaust ports, and said last-named ports being also alternately in communication With the exhaust permitting means on the said movements of the valve.

In testimony whereof, I affix my signature.

AUGUST H. KATTERJOHN. 

